#region License
//
// The Open Toolkit Library License
//
// Copyright (c) 2006 - 2009 the Open Toolkit library.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights to 
// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
// the Software, and to permit persons to whom the Software is furnished to do
// so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.
//
#endregion

#if OPENTK_DLL
using System;

namespace OpenTK
{
	/// <summary>
	/// Defines the arguments for frame events.
	/// A FrameEventArgs instance is only valid for the duration of the relevant event;
	/// do not store references to FrameEventArgs outside this event.
	/// </summary>
	public class FrameEventArgs : EventArgs
	{
		double elapsed;

		/// <summary>
		/// Constructs a new FrameEventArgs instance. 
		/// </summary>
		public FrameEventArgs ()
		{
		}

		/// <summary>
		/// Constructs a new FrameEventArgs instance. 
		/// </summary>
		/// <param name="elapsed">The amount of time that has elapsed since the previous event, in seconds.</param>
		public FrameEventArgs (double elapsed)
		{
			Time = elapsed;
		}

		/// <summary>
		/// Gets a <see cref="System.Double"/> that indicates how many seconds of time elapsed since the previous event.
		/// </summary>
		public double Time {
			get { return elapsed; }
			internal set {
				if (value < 0)
					throw new ArgumentOutOfRangeException();
				elapsed = value;
			}
		}
	}
}

#endif // OPENTK_DLL
